I believe NWN has become relegated to an "Enthusiast" platform, for DMs & Players to meet up on a server hosted by the DM / Server Admin....
Getting inside of circles of "Enthusiast" group, who still play the game, would probably be the best advice you can receive, though you are welcome to host a server, but I wouldn't expect many people logging in even if you listed it everywhere, and that's mainly because people are looking for a "nice group" to RP / Play with...
(From personal experience, I am leery about logging into dead servers, there is generally a reason why they are dead.)